/**
 * @file CodexHooksSettings.tsx
 * @description Settings → Codex → Overview → Codex hooks: whether AgentHub's
 * hooks are in `$CODEX_HOME/hooks.json` and trusted by Codex, per event, with
 * Install/Reinstall and Remove. Nothing is written until the user clicks;
 * Codex itself asks the user to trust the hooks before it runs them, and this
 * card says so while they wait, with a Refresh to re-read once they have
 * (#40 part C2).
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import {
  AlertTriangle,
  CheckCircle,
  Plug,
  RefreshCw,
  RotateCcw,
  Trash2,
  XCircle,
} from "lucide-react";
import { api } from "../../lib/api";
import type { CodexHooksStatus } from "../../lib/types";
import { Skeleton } from "../Skeleton";

const CHIP = "inline-flex items-center gap-1.5 text-xs font-medium px-2.5 py-1 rounded-full border";

/**
 * The Codex hooks card.
 * @returns A section with id `codex-hooks` for deep links.
 */
export function CodexHooksSettings() {
  const { t } = useTranslation("settings");
  const [status, setStatus] = useState<CodexHooksStatus | null>(null);
  const [busy, setBusy] = useState<"install" | "remove" | "get" | null>(null);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    api.settings.codexHooks
      .get()
      .then(setStatus)
      .catch((err) => setError(err instanceof Error ? err.message : String(err)));
  }, []);

  const run = async (kind: "install" | "remove" | "get") => {
    setBusy(kind);
    setError(null);
    try {
      setStatus(await api.settings.codexHooks[kind]());
    } catch (err) {
      setError(
        t("codexHooks.failed", { message: err instanceof Error ? err.message : String(err) })
      );
    } finally {
      setBusy(null);
    }
  };

  // Some of ours present but not all (an event added since, or one taken out
  // by hand): still show them, and still offer Remove.
  const anyInstalled = !!status && Object.values(status.events).some((e) => e.installed);
  const eventLabel = (e: { installed: boolean; trusted: boolean }) =>
    !e.installed
      ? t("codexHooks.eventMissing")
      : e.trusted
        ? t("codexHooks.eventTrusted")
        : t("codexHooks.eventUntrusted");

  const chip = !status?.installed ? (
    <span className={`${CHIP} text-fg-secondary bg-surface-2 border-border`}>
      <XCircle className="w-3.5 h-3.5" /> {t("codexHooks.notInstalled")}
    </span>
  ) : status.trusted ? (
    <span className={`${CHIP} text-status-success bg-status-success/10 border-status-success/20`}>
      <CheckCircle className="w-3.5 h-3.5" /> {t("codexHooks.trusted")}
    </span>
  ) : (
    <span className={`${CHIP} text-status-warning bg-status-warning/10 border-status-warning/20`}>
      <AlertTriangle className="w-3.5 h-3.5" /> {t("codexHooks.untrusted")}
    </span>
  );

  return (
    <section id="codex-hooks" className="scroll-mt-24">
      <h3 className="text-sm font-medium text-fg-secondary flex items-center gap-2 mb-1">
        <Plug className="w-4 h-4 text-fg-muted" />
        {t("codexHooks.title")}
      </h3>
      <p className="text-xs text-fg-muted mb-4">{t("codexHooks.description")}</p>

      <div className="card p-5 space-y-4">
        {!status && !error ? (
          <div className="space-y-2" aria-busy="true">
            <Skeleton className="h-4 w-40" />
            <Skeleton className="h-3 w-5/6" />
          </div>
        ) : null}

        {status && !status.supported ? (
          <p className="text-xs text-fg-muted">{t("codexHooks.unsupported")}</p>
        ) : null}

        {status && status.supported ? (
          <>
            <div className="flex items-center justify-between flex-wrap gap-3">
              {chip}
              <div className="flex items-center gap-2">
                <button
                  onClick={() => run("get")}
                  disabled={busy !== null}
                  className="btn-ghost text-xs disabled:opacity-50"
                >
                  <RefreshCw className={`w-3.5 h-3.5 ${busy === "get" ? "animate-spin" : ""}`} />
                  {t("codexHooks.refresh")}
                </button>
                <button
                  onClick={() => run("install")}
                  disabled={busy !== null || !status.readable}
                  className="btn-ghost text-xs disabled:opacity-50"
                >
                  {busy === "install" ? (
                    <RefreshCw className="w-3.5 h-3.5 animate-spin" />
                  ) : (
                    <RotateCcw className="w-3.5 h-3.5" />
                  )}
                  {status.installed ? t("codexHooks.reinstall") : t("codexHooks.install")}
                </button>
                {anyInstalled ? (
                  <button
                    onClick={() => run("remove")}
                    disabled={busy !== null}
                    className="btn-ghost text-xs disabled:opacity-50"
                  >
                    {busy === "remove" ? (
                      <RefreshCw className="w-3.5 h-3.5 animate-spin" />
                    ) : (
                      <Trash2 className="w-3.5 h-3.5" />
                    )}
                    {t("codexHooks.remove")}
                  </button>
                ) : null}
              </div>
            </div>

            {!status.readable ? (
              <p className="text-xs text-status-danger">
                {t("codexHooks.unreadable", { path: status.path, error: status.error ?? "" })}
              </p>
            ) : null}

            {status.installed && !status.trusted ? (
              <p className="text-xs text-fg-secondary">{t("codexHooks.trustNote")}</p>
            ) : null}

            {anyInstalled ? (
              <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 gap-2">
                {Object.entries(status.events).map(([event, e]) => (
                  <div
                    key={event}
                    title={eventLabel(e)}
                    className="flex items-center gap-1.5 text-xs px-2.5 py-1.5 rounded-md bg-surface-2"
                  >
                    {!e.installed ? (
                      <XCircle
                        aria-hidden="true"
                        className="w-3 h-3 text-status-danger flex-shrink-0"
                      />
                    ) : e.trusted ? (
                      <CheckCircle
                        aria-hidden="true"
                        className="w-3 h-3 text-status-success flex-shrink-0"
                      />
                    ) : (
                      <AlertTriangle
                        aria-hidden="true"
                        className="w-3 h-3 text-status-warning flex-shrink-0"
                      />
                    )}
                    <span className="text-fg-secondary truncate">{event}</span>
                    <span className="sr-only">{eventLabel(e)}</span>
                  </div>
                ))}
              </div>
            ) : null}

            <p className="text-[11px] text-fg-muted font-mono truncate">{status.path}</p>
          </>
        ) : null}

        {error ? (
          <div className="px-3 py-2 rounded-lg text-xs bg-status-danger/10 border border-status-danger/20 text-status-danger">
            {error}
          </div>
        ) : null}
      </div>
    </section>
  );
}